[Sidenote: The Marriage of Clarence] But at the moment when the danger seemed greatest the quick, hard blows of Lewis paralyzed the League. He called Margaret from Bar to Harfleur, where her faithful adherent Jasper Tudor, the Earl of Pembroke, prepared to cross with a small force of French soldiers into Wales. The dread of a Lancastrian rising should Margaret land in England hindered Lord Scales from crossing the sea; and marking the slowness with which the Burgundian troops gathered in Picardy Lewis flung himself in September on the Breton Duke, reduced him to submission, and exacted the surrender of the Norman towns which offered an entry for the English troops. His eagerness to complete his work by persuading Charles to recognize his failure in a personal interview threw him into the Duke's hands; and though he was released at the end of the year it was only on humiliating terms. But the danger from the triple alliance was over; he had bought a fresh peace with Burgundy, and Edward's hopes of French conquest were utterly foiled. We can hardly doubt that this failure told on the startling revolution which marked the following year. Master of Calais, wealthy, powerful as he was, Warwick had shown by his feigned submission a consciousness that single-handed he was no match for the king. In detaching from him the confidence of the Yorkist party which had regarded him as its head, Edward had robbed him of his strength. But the king was far from having won the Yorkist party to himself. His marriage with the widow of a slain Lancastrian, his promotion of a Lancastrian family to the highest honours, estranged him from the men who had fought his way to the Crown. Warwick saw that the Yorkists could still be rallied round the elder of Edward's brothers, the Duke of Clarence; and the temper of Clarence, weak and greedy of power, hating the Woodvilles, looking on himself as heir to the crown yet dreading the claims of Edward's daughter Elizabeth, lent itself to his arts. The spring of 1469 was spent in intrigues to win over Clarence by offering him the hand of Warwick's elder daughter and co-heiress, and in preparations for a rising in Lancashire. So secretly were these conducted that Edward was utterly taken by surprise when Clarence and the Earl met in July at Calais and the marriage of the Duke proved the signal for a rising at home. [Sidenote: Warwick's failure]